ホームkimizuy.dev

履歴書

Kimizu Yamasaki

kimizuyamasaki@gmail.com | 090-7582-0903 | Ehime, Japan

https://www.linkedin.com/in/kimizuy | https://github.com/kimizuy | https://kimizuy.dev

Summary

  • Frontend Engineer
  • Specialized in frontend technologies including React, TypeScript, and Next.js

Skills

Languages: TypeScript, JavaScript, HTML, CSS, Java

Technologies: React, Next.js, Gatsby, Electron, Node.js, Webpack, ESLint, Stylelint, Prettier, REST API, GraphQL, GraphQL Code Generator, emotion, styled-components, vanilla-extract, framer-motion, i18next, Storybook, Chromatic, Cypress, BackstopJS, OpenAPI, Redux, Chart.js, Highcharts, Material UI, Sass/SCSS, tailwindcss

Tools: Turborepo, Cypress, Jest, Figma, Storybook, git, Firebase, Zeplin, Vercel, Netlify, Hygraph, DatoCMS, Sanity, WordPress

Work Experience

Gaji-Labo Inc.

Frontend Engineer | April 2021 - January 2023 (1 year 10 months) | Tokyo, Japan

Specialized in frontend and UI design areas for web application development.

Alterbo Inc.

System Engineer | February 2019 - March 2020 (1 year 2 months) | Tokyo, Japan

Developed web applications and games.

Project History

As a Freelancer

Data Visualization Web Application

  • Led team as project leader while also contributing to feature development
  • Managed documentation, development environment setup, and meeting facilitation

Data Visualization Desktop Application

  • Designed and built project architecture and CI/CD pipelines
  • Implemented offline map viewing functionality

Corporate Website for C2C Company

  • Led website replacement as lead engineer
  • Designed and built monorepo project structure

Gaji-Labo Inc.

Corporate Website for B2B Company

  • Rebuilt corporate website using Next.js and headless CMS
  • Improved site performance by over 30%

B2B and B2C Application for Construction Equipment Rental

  • Gained experience in agile development, pixel-perfect markup implementation, and E2E testing methodology development

Landing Page Site for B2B Company

  • Refactored large-scale landing page site, improving Core Web Vital scores by an average of 30% and organic search traffic by 15%
  • Migrated codebase from JavaScript to TypeScript to improve maintainability

B2B Company Event Application

  • Built and documented a system allowing non-engineers to directly input and edit data
  • Optimized React code and safely updated various packages to achieve better performance and maintainability

Corporate Website

  • Led technology selection, data migration to new CMS, and transition to Next.js
  • Optimized React code and images to improve site performance by 20%, contributing to SEO

Mobile Game Event Website

  • Developed UI components for game features including voice chat and quizzes

Alterbo Inc.

Airport User Management Web Application

  • Designed and implemented frontend using React, Redux, and TypeScript

Education

Ehime University | Bachelor of Policy Studies | April 2010 - March 2015